This one is rated for a continuous 75 A, adjustable from 57 to 75 A via a dial, and it's a CLASS 10 trip, meaning it will open the circuit within 10 seconds at 7.2× the set current. That's the right speed for standard three-phase induction motors starting across the line.
The adjustable current range of 57 to 75 A tells you the motor FLA this relay can protect. If your motor nameplate says 65 A, you dial it in. It's a 3-pole relay with screw-type terminals on both the main and auxiliary circuits. The main terminals accept 2x (10 AWG to 1/0) or a single 2/0. The auxiliary contacts take 2x (20 to 16 AWG). Tightening torque on the mains is 4 to 6 N·m — use a torque driver, not a feel.
Where it goes — panel and environment
This relay is designed for stand-alone installation, not DIN-rail snap-on. It mounts directly to the contactor or on a separate base. It needs 6 mm of free air space to grounded parts on the side for cooling. It's built for the SIRIUS S3 contactor frame size. Shock resistance is 8g for 10 ms per IEC 60068-2-27, and surge voltage resistance is 8 kV. Installation altitude is limited to 2 000 m above sea level without derating.